Which is an example of a quadratic trinomial ​

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y < 4x − 8 y is greater than or equal to negative 5 over 2 times x plus 5 part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points) part b: is the point (5, −8) included in the solution area for the system? justify your answer mathematically. (4 points)